It must hurt when you have advocated as much for a campaign has Rachel Maddow has for Bernie Sanders and the campaign decides to make lies out of your reporting. Say what you want about Rachel, she is nothing if not mama-bear protective of her own reporting when it comes to facts.
So when Tad Devine, former Monsanto lobbyist and current superbly well-compensated Bernie Sanders campaign strategist and Jeff Weaver, the campaign manager for Sen. Sanders, tried to explain away their candidate's losses in eight states by saying it was only because they didn't want those voters and delegates anyway, Rachel was furious. She had herself done reporting in February (before those states had voted) about the Sanders campaign's on-the-ground superiority over the Clinton campaign, both in number and in longevity, and she was not having this revisionism.
Maddow found that in least four of the eight states Sanders campaign tried to explain away by claiming they did not compete, not only did they compete but they arrived in those states earlier than the Clinton campaign and opened more offices. And who can forget that pro-Sanders super PAC holding a session with White people teaching them how to talk to black women?
This all points to something bigger. It's that the highest echelon of the Sanders campaign staff are either completely delusional or playing the part of Baghdad Bob for their candidate. Either way, it demonstrates that Sanders and his campaign cannot deal with setbacks well, and are nowhere close to ready for prime time.